Accessibility law is a real obligation, and it applies to the PDFs linked from a public-facing website in the same way it applies to the rest of that website. The laws below cover most organisations that will read this page. They are set out here as a reference, not as the reason to act. The reason to act, for most organisations reading now, is that AI systems are already reading their PDFs and cannot use them properly. Accessibility is the second obligation on the same content.
United States
Title II of the ADA covers state and local government. The 2024 Department of Justice final rule sets WCAG 2.1 AA as the technical standard for web content and mobile apps, including the PDFs linked from those websites. Compliance dates are staggered by population size and are already in force for the largest public entities. Title III covers places of public accommodation. Section 508 covers federal agencies and the systems they procure.
ADA.gov: 2024 web accessibility final rule
European Union
The European Accessibility Act applies from 28 June 2025 and covers a broad set of products and services offered to consumers, including e-commerce, banking services, e-books and the digital content that supports them. The Web Accessibility Directive already covers public-sector bodies across the Member States. Both point at WCAG as the practical standard, and both reach the PDFs linked from a covered service.
European Commission: European Accessibility Act
United Kingdom
The Equality Act 2010 places a duty on service providers to make reasonable adjustments so that disabled people are not placed at a substantial disadvantage. The Public Sector Bodies Accessibility Regulations 2018 sit on top of that duty for public sector websites and mobile apps, and require WCAG 2.2 AA and an accessibility statement.
GOV.UK: meet the accessibility regulations
Australia
The Disability Discrimination Act 1992 makes it unlawful to discriminate against a person on the ground of disability in the provision of goods, services and facilities. The Australian Human Rights Commission has long confirmed that this reaches web content, and points at WCAG as the practical standard for meeting the duty.
Australian Human Rights Commission: digital accessibility
Why the law is a reinforcement, not the lead
The organisations that lead on this rarely do so because they were told to. They do it because inaccessible content is content nobody can use, and increasingly that includes the AI systems visitors are now sending in on their behalf. If a PDF cannot be read by a screen reader, an LLM will not read it cleanly either. The same conversion that satisfies WCAG produces the machine-readable output an AI answer engine needs. The law is the floor. The behaviour of the audience is the ceiling.
For a fuller treatment of the two obligations sitting on the same document, see The two obligations on your PDFs.